pht6168.com-Chemical & raw materials

Liner for rubber sheet

Liner used for avoiding adhesion of upper and bottom layer of rubberized fabric, glued yarn and tread rubber.

These liner are supplied in B 8 ( warp: nylon, weft : polyester ), and PP ( warp & weft : polypropylene ). All liner have been heat treated to enhance stability.

In some applications, like in the topping process, liner must have stiffer transverse to prevent rubberized tyre cord from curling and folding together. B 8 liner with its proper stiffness in transverse is the best choice, Where as in the bias-cutting process, both B 8 and PP liners can be used.

Classification		PP Liner		B 8 Liner
Classification		Warp	Weft	Warp	Weft
Material		PP 400 D/1	PP 750 D/1	N 6 420 D/1	PET 1000 D/1
Cord density	Epi	50 +/- 2	28 +/- 1	50 +/- 2	28 +/- 1
Tensile strength	Kg / cm	Min 27		Min 39	Min 72
Shrinkage @ 120cx30’	%	Max 5	Max 1	Max 5	Max 1
Fabric gauge	mm	0.38 +/- 0.08
Fabric weight	g / m	195 +/- 15		250 +/- 15

Bicycle valve tubing

PHT valve tubing is used for the cores plunger of E/V (English type) & D/V(Germany type) of bicycle tube valve.

Item	PHT - 902
Inside dia.	1.8 ± 0.1 mm
Outside dia.	3.3 ± 0.1 mm
Color	Natural color
Packing	20 kgs / carton

Curing tape for rubber

PHT-615

PHT-616

Model	PHT - 615	PHT - 616
Material	Cotton weave	Warp nylon 6.6, d’tex 235, z 20 t/m Weft nylon 6.6, d’tex 110, z 20 t/m
Fabric size	W 2 1/2”	W 70 mm
Length of roll approx	90 ~ 120 yards	90 ~ 120 meter
Softening point	250 °C	235 °C
Melting point	270 °C	250 °C
Thickness approx	1.5 mm	0.4 mm
Weight approx	5 kgs / roll	1.6 kgs / roll
Weight	----	10 rolls / bag

Use :

Superior curing wrap tapes made to exacting international standards, utilising specialised premium quality high tenacity cotton, polyamide, provide cure wrap tape capable of withstanding multiple vulcanizing cycles without comprising the cure wrap tape performance. Cure wrap tape is also referred to as nylon hose wrap or hose wrap. The high performance cure wrap tape are manufactured for use in the curing of rubber hoses and rollers during vulcanization as well as for a wide range of curing and wrapping applications.

Features & benefits:

‧Dimensional stability & thermal shrinking properties : The excellent dimensional stability, in conjunction with superior thermal shrinkage properties, provides the required product characteristics during the vulcanization process. Minimal adhesion and even shrinkage strength provide a quality end result.

‧Multiple use : The cure wrap tapes are designed for multiple use before product failure thus ensuring low cost per use within the vulcanization process. This ensures best value for money.

‧Diverse material : The supply of cure wrap tapes utilizing alternative materials provides for unique applications requiring improved stability and support in the manufacture and vulcanization of non-standard products or specialized temperatures.

‧Customer specifications : Our extensive product development capability provides an ability to custom design and manufacture to our customer’s unique specifications.

Glass beads for blasting

Blasting glass beads are used in the pre-treatment of positive polarity & electroplating, finish processes, cleaning & rust removal from various kinds of molds, machine parts, tools etc.
After treatment, the surface of the work piece will have become smooth with a peculiar finish. It can enhance product value with no damage to the processed surface. It comes in several precision sizes. It’s suitable for dry and wet blasting operations.

Item	Grain diameter μ	Item	Grain diameter μ
PHT-G 035	400 - 600	PHT-G 150	70 - 150
PHT-G 060	200 - 400	PHT-G 180	70 - 110
PHT-G 080	150 - 250	PHT-G 220	50 - 100
PHT-G 100	100 - 200	PHT-G 280	40 - 70
PHT-G 120	100 - 150	PHT-G 320	1 - 50

Rubber usage

Natural rubber (NR) .. (Hevea, rubber, natural cis-polyisoprene)

A general purpose rubber with the optimum balance of physical properties essential for high performance engineering applications. Long fatigue life, first choice for spring applications. Has high strength without the need for reinforcing fillers. Can be compounded to give a wide range of hardness. Good low temperature flexibility Poor resistance to oils and solvents. Requires protection against oxidisation, ozone and heat. It can be extended by oil with little loss of mechanical properties.

Isoprene rubber (IR) .. (synthetic cis-polyisoprene)

Very similar properties to natural rubber but more difficult to process.

Styrene butadiene rubber (SBR)

The most important general purpose synthetic rubber. It must be compounded with reinforcing fillers for high strength and then has physical and chemical properties similar to natural rubber, except that generally abrasion resistance is better and fatigue resistance is pooer. It is not suitable for springs but has used widely for vehicle tyres where it is generally oil extended.

Butadiene rubber (BR)

Low hysteresis, good temperature flexibility and high abrasion resistance under severe weather conditions. Poor processing properties and poor tear properties. Used in blends with SBR and natural rubber. Main use in in manufacture of tyres.

Chloroprene rubber (CR) .. Neoprene ..

Several types of polychloroprene. Mechanical properties generally inferior to natural rubber but superior chemical properties. Over time crystallisation results in hardening at temperatures about -10 deg. C. Very good resistance to ozone.

Nitrile rubber (NBR) .. (Acrylonitrile butediene copolymer)

Nitrile rubbers are copolymers of butadiene and acrylonitrile. The oil resistance increases as the acrylonitrile content but at the expense of resilience. Used for O rings and oil seals.

EPM rubber (EPM) .. (ethylene propylene copolymer)+ EPDM rubber (EPDM) ..(ethylene propylene terpolymer)

Similar to SBR but improved resistance to atmostpheric ageing, oxidisation, and ozone. Not compatable with elastomers listed above.

Chlorosulphonyl polytethylene (CSM) ..(Hypolon)

Excellent resistance to oxygen, ozone, and most chemicals. Low gas permeability. Used for protective coatings.

Acrylic Rubber (ACM) (Alkyl acrylate coplolymer).

Good resistance at normal and elevated temperatures to oil and oxygen. Excellent ozone and and weathering resistance. Poor moist heat resistance.

Silicone rubber (SI)

Moderate physical properties but are retained at high or low temperatures. Good electrical properties.

Fluoro rubbers (FKM) .. (Fluorel, Kel-F, viton)

Excellent resistance to strong oxidising acids, aromatic fuels and solvents at high temperatures, and to oxidation weathering and ozone.

Butyl rubber (BUTYl) .. (isombutylene-isoprene copolymer)

Good ozone, weathering, heat and chemical resistance. It has a very high impermeability to gases. Low resilience at ambient temperatures and is suitable for damping applications. Incompatible with elastomers listed above. Can be compounded with chlorine to give improved ozone, weathering resistance and high temperature stability. Used for inner tubes.

Polysulphide rubber (TR) .. Thiokol (condensates of sodium polysulphides with organic dihalides.)

Excellent high resistance to oils, fuels , solvents, oxygen and also low gas permeability. Poor physica,heat, and wear properties.

Polyurethane rubber .. (AU - Polyester type...EU- polyether type)

Good abrasion, tensile and tear strength, good resistance to aliphatic solvents and mineral oils, oxygen and ozone. Moderate resistance to dry heat. Poor resistance to moist heat.

Epichlorohydrin (CO)

High resistance to ageing oxidatio, ozone and hot oil. Good resistance to hydrocarbon solvents combined with moderate low temperature flexibility, poor abrasion resistance and electrical properties.

Polypropylene oxide rubber (PO) .. (a copolymer with about 5% allyl glycol ether)

Similar to SBR in requiring reinforcing fillers for adequate strength. Good resistance to ozone, flexing and heat ageing. Good low temperature flexibility; moderate oil resistance. properties.